Leveling-harrow



J. c. BLOOMFIELD. Lemme HARROW. APPLICATION FILED NOV. 17, 1919- 1 3 9 808 PatentedSept. 6, 1921.

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J. C. BLOOMFIELD.

L EVELING HARROW.

APPLICATION FILED NOV. 17, 1919.

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LEVELING-HARROW.

Specification of Letters Patent.

Patented Sept. 6, 1921.

Application filed November 17, 1919. Serial No. 338,509.

To all whom it may concern Be it known that I, JOHN G. BLooMFmLD, a citizen of the United States, residing at East Columbus, in the county of Franklin and State of Ohio, have invented new and useful Improvements in Leveling-Harrows, of which the following is a specification.

This invention relates to improvements in leveling harrows and provides a device of this character which may be made cheaply and yet the construction is such that it is practically indestructible and is therefore especially suitable for the class of work it is intended to perform, namely, leveling of rough plowed fields.

A novel feature of the invention resides in providing a construction in which the angular relation of the blades may be varied to suit conditions by simply moving a single lever. 7

Further novel features of the invention will be pointed out in the following description of a specific embodiment and 1n the appended claim covering the same.

In the drawings, annexed hereto and forming a part of this specification:

Figure l is a top plan view of the harrow.

Fig. 2 is a bottom plan view.

Fig. 3 is an end elevation.

Fig. 4 is a transverse section on line 4-4 of Fig. 1.

In detail:

The harrow comprises a frame of rectangular shape formed of angle irons 1 and 2, the former being at the forward end of the harrow and both having their flanges 3 and 4: facing toward the rear; the angle irons 1 and 2 are joined to form the frame by end members 5 and 6 bolted or otherwise secured in position as shown at 7.

Between the side angle irons 1 and 2 are two similarly positioned angle irons.25 and 26 braced intermediately by members 27, 28, 29 and 30. Said angle irons 25 and 26 are braced to each other at approximately the center by parallel members 31 and 32 carrying an upright quadrant 33 notched to receive the latch of a lever 35, said latch being operated by a finger piece 36 and spring 37. The lever 35 is pivoted at 38 as shown and its lower end connected with a link 39 while above its pivot point 38 it is connected with another link 40, both links extending in opposite directions for purposes to he hereinafter set forth.

Spaced along angle irons l and 2 are holes to receive pivots 4:1 carrying blades 42 which are divided into four groups, A, B and A and B. The inner ends of the blade of each are pivotally carried by members d3, 44, 45 and l6 which slide on the flanged angle irons 25 and 26. The blades of groups A and A are always at the same angle with respect to the frame and likewise the blades of groups B and B, while at a different angle to the frame than groups A and A are also at the same angle to the frame with respect to each other. This is accomplished by connecting the members 13 and 45 by the cross piece 47 and members 44 and 4:6 by the cross piece 48. Said cross pieces 4-? and 48 connect at their central portions with links 39 and 40 respectively, thus by operating the lever 35, the angular relation of the blades with respect to the frame and ground traveled over may be varied while the various groups still retain their angularitv with respect to each other. The blades are arranged so that those of the opposite sets extend in the same direction; thus the immediately opposite group does not correspond in direction and therefore evenly spreads the earth in passing thereover.

Having thus described my invention I claim A harrow comprising a rectangular frame, blades each pivotally mounted on two parallel sides of said frame, angle irons carried by said frame and parallel with the sides mounting said blades, flange members bolted to the adiacent ends of said blades and overlying said angle irons whereby a sliding guide is formed, and means connected with said flanges for moving the same to vary the angle of the blades with respect to the frame.

In testimony whereof I afiix my signature.

JOHN C. BLOOMFIELD. 

